Cook Elizabeth A 4

What Happened
Elizabeth A. Cook, a director of CME Group Inc. (CME), was granted 645 shares of Class A common stock on June 25, 2026. The shares were valued at $225.00 each, for a total grant value of $145,125. This transaction is an award/compensation (transaction code A), not an open-market purchase or sale.

Key Details

• Transaction date and price: June 25, 2026 — 645 shares at $225.00 per share.
• Total value: $145,125.
• Shares owned after transaction: Not disclosed in this Form 4.
• Footnote: These are fully vested shares issued under the CME Group Director Stock Plan and are not subject to any vesting conditions (per footnote F1).
• Filing timeliness: Form was filed on June 29, 2026 (four calendar days after the transaction), which is outside the typical two-business-day Form 4 reporting window.

Context
This was a routine director equity grant as part of CME’s annual compensation program for non-employee directors. Such grants are compensation-related and do not necessarily signal the director buying shares on the open market or conveying a trading view.